RFR: Ignore cancelled checks when summarizing results

[Robin Westberg]

Cancelled (or skipped) checks can lead to empty lines in the summary, so just ignore those.

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Commit messages:
 - Ignore cancelled checks when summarizing results

Changes: https://git.openjdk.java.net/skara/pull/870/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=870&range=00
  Stats: 15 lines in 2 files changed: 15 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/skara/pull/870.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/870/head:pull/870

PR: https://git.openjdk.java.net/skara/pull/870